package dao;

import java.sql.Timestamp;
import java.util.List;
import java.util.Set;

import org.hibernate.LockMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import pojo.Myclass;

/**
 * A data access object (DAO) providing persistence and search support for
 * Myclass entities. Transaction control of the save(), update() and delete()
 * operations can directly support Spring container-managed transactions or they
 * can be augmented to handle user-managed Spring transactions. Each of these
 * methods provides additional information for how to configure it for the
 * desired type of transaction control.
 * 
 * @see dao.Myclass
 * @author MyEclipse Persistence Tools
 */
public class MyclassDAO extends HibernateDaoSupport {
	private static final Logger log = LoggerFactory.getLogger(MyclassDAO.class);
	// property constants
	public static final String MY_CLASS_NAME = "myClassName";

	protected void initDao() {
		// do nothing
	}

	public void save(Myclass transientInstance) {
		log.debug("saving Myclass instance");
		try {
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(Myclass persistentInstance) {
		log.debug("deleting Myclass instance");
		try {
			getHibernateTemplate().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public Myclass findById(java.lang.Integer id) {
		log.debug("getting Myclass instance with id: " + id);
		try {
			Myclass instance = (Myclass) getHibernateTemplate().get(
					"pojo.Myclass", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Myclass instance) {
		log.debug("finding Myclass instance by example");
		try {
			List results = getHibernateTemplate().findByExample(instance);
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding Myclass instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Myclass as model where model."
					+ propertyName + "= ?";
			return getHibernateTemplate().find(queryString, value);
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}
	
	public List findByTeacherUserName(String teacherUserName){
		log.debug("finding Myclass by teacher user name: " + teacherUserName);
		try {
			String queryString = "select m from Myclass as m left join m.teacher t where m.teacher = t and t.teacherUserName = ?";
			return getHibernateTemplate().find(queryString, teacherUserName);
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByMyClassName(Object myClassName) {
		return findByProperty(MY_CLASS_NAME, myClassName);
	}

	public List findAll() {
		log.debug("finding all Myclass instances");
		try {
			String queryString = "from Myclass";
			return getHibernateTemplate().find(queryString);
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public Myclass merge(Myclass detachedInstance) {
		log.debug("merging Myclass instance");
		try {
			Myclass result = (Myclass) getHibernateTemplate().merge(
					detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(Myclass instance) {
		log.debug("attaching dirty Myclass instance");
		try {
			getHibernateTemplate().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Myclass instance) {
		log.debug("attaching clean Myclass instance");
		try {
			getHibernateTemplate().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public static MyclassDAO getFromApplicationContext(ApplicationContext ctx) {
		return (MyclassDAO) ctx.getBean("MyclassDAO");
	}
}